Improvement in machine foe burnishing and spinning metals



9 i a glatten tetra Vstent @time FREDERICK J. SEYMOUR, OF WOLGOTTVILLE, `.ASSIGrNGIt TO HIMSELF ND .E MILLER AND COMPANY, 0F MERIDEN, CONNECTICUT.

Letters PatentrNo. 80,836, dated August 11, 1868.

p IMPROVEMENT IN MAGHINE FOR BURNISHING AND SPINNING'METALS @te .Srtehnle minet tu im itin Entert tant mit mating @nl otite amm 'ro ALL wHoM 1r MAY coNcEzsN:

Bef/it known that I, FREDERICK J. SEYMOUR, of Wolcottville, in the county of Litchfield, and State of Conneeficnt, have invented, made, and applied to use a certain new and useful Improvement in Machinery for Spinning or Burnishing Articles of lSheet Metal; ,and I do hereby Vdeclare the following tobe a fall, clear, and exact description of the said inventiemfreference being had to the annexed drawing, making part of this speci ication, whereinf -Figure 1 is a plan of vmy said machine complete.

Figure 2 is an elevation of the tool-holding slide-rest.`

Figure 3 is a section of the tool-stock andslide. Y

Figure 4 is a plan of the tool-stock and slide with the cap-plate removed.

Figure 5 is a longitudinal section of the tool-'stock and parts that operate on the same, and

Figure 6 is an elevation of a conical former, that may be used for giving shape to the article to be made in its first stages. I

Similar marks of reference denote thc same parts.

Machines have 'heretofore beenmade for operating upondisks of sheet metal, to spin them up to the shape of a chuck or former, thesaid chuck or former and the sheet metal revolving against a roller that is held to said sheet metal by a slide-rest, to which motion is given to cause the roller to move along theisurface of the chuck or former, as may bessen in the French patent of Japy Brothers, dated March 1, 1836.

'.Ihe nature oi' my said invention consists in mechanism for holdingv afroll or bnrnisher with a yielding or elastic power against the revolving sheet metal and former, so that the spinning up of articles of sheet metal can be done with a tool that is held by mechanism that will yield to the curvatures ofthe former or chuck, and ,operate similarly to the spinning of. sheet-metal articles by hand.

By my mechanism, irregular shapes, such as used for lamps, oil-cans, alte., can be spun vup with great speed and precision by a workman with but little experience or bodily strength, while the spinning of large articles of sheet metal hasfheretofore required a workman with considerable experience and hodilystrength to hold' the tool.

My improvements are adapted to spinning up o t regular conical articles in sheet metal, but are more par- `ticularly available in spinning up ornamental articles formed with curved sides or angular bends, forming bands or varying-shaped circular articles, now spun np by hand or'pressed up in dies.

In the drawing, ais the bed ofthe machine, carrying the head 6, that supports the mandrel c, upon which is a pulley, d, drivenv by competent power.

c is the chuck or former, of the desired shape, corresponding with the interior of the lamp-reservoir or other article to be produced.v This former e is screwed upon the end of the mandrel c, and can be changed as required for'diii'erent articles, or for diii'erent stages of the same article.

f isthe movable head, carrying theT sliding mandrel g, set up by the hand-wheel h, to clamp the disk of metal between the clamping-head or whirl h and the former e. i

Upon the top of the bed a is a bed,k, forming a slide for the toolholding mechanism, and this bed may be turned to any desired angle to the lcentre line of the machine, so as to be parallel, or nearly so, with the general outline ofl the article to be formed, as i'llustratedin' tig. 1. i

The bed /c is attached by a bolt near the centre thereof, as shown by dotted lines in g. 2.

lUpon the topof the bed /c are V-slides,.receiving the secondary bed, Z, with a rack, m, on one side, acted upon by the pinion n, that is moved b-y the'hand-wheel p, sothat the tool, andthe slide-rests carrying the same, can be moved along over the surface of the sheet metal by turning said whcclp and sliding the secondary -bed l along on the bed k. Y y

v.Ihe slide-rest q is attached to the secondary bed Z by the `slots and screws o, so that it can be securedy at sasso any desired angle to the said bed l, for regulating the direction in which the roller or burnishing-tool and its stock stands to the metal operated upon.

The tool-holding slide s is fitted to move en'dwise upon V-slides, upon thc rest q, and r is the screw and handle thatoperates upon the nut r to move the slide s.

. The tool t is mounted at the end of the stock t', that is fitted to slide e'ndwise through the slide s, and within said slide s the spring v operates, between they upper end of the nut 1 and a shoulder,l 3, to project the 4tool t, but if the pressure upon the tool becomes too' great, the spring v yields, and allows the tool and stock to move back, and thus the tool is made'to follow up the sheet metal, and keep it into contact with the surface of i the chuck or former, whatever the shape of that former may be, the parts being properly sct to operate in connection with the particular former. 4 Y

When the tool is to be moved alongr again to the right, to commence a second operation, the stock t is to be drawn back by the lever w, (sec g. l and red lines, iig. 4,) acting against a toe that projects from the collar 5,-that is attached to the back end of the' stock t', and a spring, 6, draws said lever down to latch it behind the catch 7. The raising of this lever to unlatch it, when the tool is oppos1te the place of beginning on the disk or'articlc of sheet metal, allows the spring 'u to project the tool for proceeding as before.

In burnishing articles of sheet metal, I find it best to use the roll t, kept from turning by a set-screw at 8, A

as a circular burnisher of this character can be kept in order with great facility.

The stock t can be clamped, so thatthe too'l will be rigid, bythe screw 9. This may be emplpyed where -a straight-sided conical article is being spun up, especially where it is desired to reduce the thickness of the metal during the spinning operation.

If the parts are adjusted to a given movement, and it is desired to make the springt: more powerful in its operation, the screws 10 may betightened to fasten the tool-slide s immovably tothe slide-rest q, and then, by

turning the screw r, the nut 1" will compress the spring u.

I prefer to use a screw at 11, to `hold the nut r back to its place, under ordinary circumstances. This screw 11 is to be slackened or removed when the spring is rendered 'more powerful by the movement of the nut r.

By the apparatus constructed as aforesaid, the workman is relieved from the labor of holding the tool while the spinning operation is performed, and he is able to guide and direct his tool with precision, in a manner corresponding generally to that employed in turning metals with a slide-rest; and, in addition to the yielding force applied to the tool, to cause it to conform to the shape of the chuck or former, thescrew r and handwheel 10 place the tool under the direction of the attendant, and if the spring c is too powerful for any particular character of work, its force may be .lessened by the hand acting to draw back thc lever w.

What I claim, and desire tdsecure by Letters Patent, is-

1. A revolving chuck or former, in combination with a tool tted to yield and moved automatically, in

spinning or burnishing articles of sheet metal upon said chuck or former, substantially as formed.

` 2. The lever w, in combination with the tool t, stock t', and spring for withdrawing said tool from the work, as set forth.

3. The roll t and set-screw'S, for converting said roll into a burnisher, as and for the purposes set forth. 4. The arrangement of the tool-holding slides, nut r', screw r, and slide-rest g, and screws I0 10 10, for the purposesand as set forth.

5. The tool-holding slide s, tool t, spring n, lever w, slide-rest g, secondary bfi-dil, lbed c, and hand-wheel p,

arranged and applied substantially as specified, for spinning or burnishing articles of s'hect metal upon a revolving chuck or former, as set'forth.V

In witness wh'reof, I have hereunto set my signature, this fifth day of May, 1868.

FREDK J. SEYMOUR. Witnesses: e

W. H. PERKINS, 

